Did you see my "Homo nintendonus" suggestion? That's what Mario is according to the Nintendo character guide. Though I believe it only refers to the cartoonish humans in the Marioverse, the realistic New Donkers are probably Homo sapiens
Hey sorry, been working 16 hour days for the summer so I kind of got super side tracked there for a while. I cut my hours down so I should be back on here more often again.
To answer your question, it does eventually get easier to do it that way. The galleries on both Alien Species Wiki and Non-Alien Creature Wiki, for instance, were also my projects. In both of those cases the pages get so image heavy that they were ultimately split up into 26 individual pages per topic.
But with that in mind, there are over 1 million species on the planet, plus all of the made-up species so a single alphabetical number to collect all creatures under wouldn't exactly work, either in that regard. We'll obviously never get every species on here since the work force to do that would be next to impossible but I also personally like categorizing media species by figuring out their evolutionary lineages.
I am not opposed to amalgamated gallery pages being created but they will certainly become a daunting task to maintain as time goes on.